Предмет: Химия, автор: 174danil

Составьте уравнение электродных процессов и молекулярное уравнение реакции, Протекающей при электрохимической коррозии гальванопары Fe-Sn в атмосфере влажного воздуха.

Ответы

Автор ответа: svin99
1
Схема элемента
(-)Fe/Fe(2+) | Н2О, О2 |  (Sn) 2Н2О, О2/ 4ОН(-) (+)
Железо окисляется, водород восстанавливается
Анод: Fe - 2e = Fe(+2)
Катод 2Н2О + О2 +4е = 4ОН(-)
2Fe +  2H2O + O2 = 2Fe(OH)2

svin99: См. выше.
svin99: Хм... Я тоже перерешал массу, и что?
svin99: В случае водородной деполяризации в схеме указывается на катоде образование водорода, в случае кислородной деполяризации - образование гидроксид-ионов.
svin99: Ну так и прими мои искренние поздравления!
svin99: Романцева и др. Сборник задач и упражнений по общей химии. М.: Высшая школа, 1991.
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